Definition of polygonum

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< polygon

polygraph >

po·lyg·o·num    (p-lg-nm) KEY 

NOUN:

Any of numerous plants of the widely distributed genus Polygonum, characterized by stems with knotlike joints and conspicuous sheathlike stipules.

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ETYMOLOGY:
New Latin Polygonum, genus name, from Greek polugonon, knotgrass : polu-, poly- + gonu, knee; see genu-¹ in Indo-European roots